Air-pump for condensers



F. LJUNGSTROM.

AIR PUMP FOR CONDENSERS.

APPLICATION FILED} MAY 28, 1919.

1,394,748. Patented Oct. 25, 1921.

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era's rarer carton.

FREDRIK LJUNGSTRM, 0F BBEVIK, LIDINGfiN, SWEDEN, ASSIG-NOR TO AK'IIE- IBQLAGET LJ'UNGS'IRMS ANGTURBIN, OF STOCKHOLM, SWEDEN, A CORPORA.=

EXON.

PUMP FOR CONDENSER/S.

Specification of Letters Patent.

Patented (Get. 25, 1221.

To all whom it may concern:

Be it known that I, FR'EDRIK LJUNGsTR-tiM, subject of the King of Sweden, residing at Brevik, Lidingon, in the Kingdom of Sweden, have invented certain new and useful Improvement in Air-Pumps for Condensers, of which the following is a specification.

In patent application No. 191392, filed September 14, 1917, there is set forth an airpump for condensers consisting of a number of steam ejectors coupled in series with surface condensers, the water of condensation of which is conducted to a common collector from which latter it is drawn ofi the pump.

This inventionwhich is also applicable to other types of air-pumps-has for its purpose to attain a better efiiciency of the air-pump and consists therein, that the water of condensation is caused to pass through the air pump in about the opposite order to the air, so as to effect a further cooling of the water of condensation.

An embodiment of the invention is shown by way of example in the accompanying drawing in which Figure 1 is a longitudinal section of the arrangement and Fig. 2 represents a cross section on the line A--A in Fig. 1. Figs. 3 and 4 illustrate a modified form of construction.

1 denotes the inlet from the condenser to be evacuated, 2 is an ejector chamber into which the nozzle 3 of steam ejector projects and 4 designates the receiver of the ejector. Each section of the surface condenser is provided with a plurality of pipes 5. 3 3 and 3 are steam ejecting nozzles.

When using the air-pump .the object of the invention is attained as follows. Air and steam pass from the main condenser through the inlet 1 into the chamber 2, then through the receiver 4 to the part of the lowermost condenser situated behind the section, shown in Fig. 1, further to the lowermost chamber 7, from the latter to the part of said lowermost condenser situated in the plane of the drawing. lhe commingled air and steam pass then through the pipe 8 to the chamber 21, then through the pipe 9 to the foremost part of the second surface condenser, through the second chamber 7 to the rearmost part of said second condenser and then to the rear chamber 2 further to the rearmost part of the third surface condenser and so on. In other words, the movement of the air and the steam through the air pump is effected 1n zigzag in the plane of the drawing as well as in a plane at right angles thereto, and the main flow direction or the general flow order of air and steam] is directed from below and upward in Fig. 1, the air and steam passing from one horizontal section of the air pump to the next horizontal section situated above from below and upward through the corresponding receiver and %he water of condensation is sucked with the air commingled with steam through the different sections of the air pump. Said water of condensation passes, contrary to the air and steam, from one horizontal section of the air pump to the next horizontal section situated below through a passage 15, a calibrated hole 17 and a pipe 16, saidwater consequently being mixed with water of condensation formed in this latter section. At last the Water is drawn ofi through pipe 19.

From this it follows that the main flow direction or the general flow order of the water ofcondensation is directed from above and downward in Fig. 1 and therefore, on the whole, is opposite to the corresponding direction of flow or flow order of air and steam. By this arrangement it is obtained that the condensate contributes to the condensation of the steam.

13 are apertures for they passage of the cooling waterbetween the inlet 12 and the outlet 14. 11 is the air-outlet of the pump.

The apertures 17 are cleaned by means of needles 18, which may be screwed or pressed down in the apertures 17. These apertures are calibrated, that is, to say, every succeeding aperture is somewhat larger than the preceding one, the diameters of the holes being also adapted to the quantity of liquid passing.

' In order to obviate the cleaning of every aperture 17 per se, a rod 25 capable of being revolved by means of a handle 26 or the like, or some other mechanism may be used by means of. which the needles. 18 may be operated all at the same time, or successively, through the medium of arms 24. The arms 24 preferably abut against the flattened heads 23 of the needles 18. 22 are helical springs provided for the outward displacement of the needles. In this way either all of the needles may be actuated by one handle, or different groups of needles may be 0 erated with separate handles.

at I claim as new and desire to secure by Letters Patentof the United States is 1. The combination with an air pump consisting of a plurality of steam ejectors and a plurality of surface condensers coupled in series therewith, of means connected with the surface condensers for renderin the main flow order of the water of con ensation through the pump opposite to the main flow order of the air and steam through the same so as to subject the steam to a further cooling action.

2. An arrangement as claimed in claim 1 wherein pipes are provided for insuring a flow. of water of condensation from one surface condenser to the interior of an adjacent surface condenser.

3. An arrangement as claimed in claim 2 and in which the pipes are provided with calibrated holes and cleansing needles c0- acting with the same, characterized 'by a common manually operable mechanism being employed for actuating the cleansing needles.

Intestimony whereof I aflix my signature in presence of two Witnesses.

FREDRIK LJ UN GSTRCM.

Witnesses GRETI PRUN, ELIE WABMAN. 

